Dynotopo warning “Vertex Data Detected”
I'm new to blender have version 2.90...
Maybe you can try this.
Click on the &quot;Object Data Properties&quot; tab (the green triangle, third last  on the right), then unfold &quot;UV Maps&quot; and click the minus symbol on the right.
I don't know what will be the effect but I'm sure it'll not complain you...
Hope it will help.      Thank you!